@article{TMF_1974_21_2_a3,
     author = {V. S. Gerdjikov and P. P. Kulish},
     title = {Low-energy structure of the {Feynman} $S$-matrix},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {183--194},
     year = {1974},
     volume = {21},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1974_21_2_a3/}
}